Standardize usage of virtual/override/final in components/

components/signin/core/browser/signin_client.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_CLIENT_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_CLIENT_H_
 
 #include "base/callback.h"
 #include "base/callback_list.h"
 #include "base/time/time.h"
@@ skipping 20 matching lines @@
 // An interface that needs to be supplied to the Signin component by its
 // embedder.
 class SigninClient : public KeyedService {
  public:
   typedef base::Callback<void(const net::CanonicalCookie* cookie)>
       CookieChangedCallback;
 
   typedef base::CallbackList<void(const net::CanonicalCookie* cookie)>
       CookieChangedCallbackList;
 
-  virtual ~SigninClient() {}
+  ~SigninClient() override {}
 
   // Gets the preferences associated with the client.
   virtual PrefService* GetPrefs() = 0;
 
   // Gets the TokenWebData instance associated with the client.
   virtual scoped_refptr<TokenWebData> GetDatabase() = 0;
 
   // Returns whether it is possible to revoke credentials.
   virtual bool CanRevokeCredentials() = 0;
 
@@ skipping 39 matching lines @@
   virtual base::Time GetInstallDate() = 0;
 
 #if defined(OS_IOS)
   // TODO(msarda): http://crbug.com/358544 Remove this iOS specific code from
   // the core SigninClient.
   virtual ios::ProfileOAuth2TokenServiceIOSProvider* GetIOSProvider() = 0;
 #endif
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_CLIENT_H_